After having the same problem I did some research and figured it out.
It is your anti-virus. Windows Vista comes with one called Windows
Defender.
It is Windows Defender that is causing you this problem.
to solve this problem:
1. Open control panel
2. click on classic view on the left hand panel
3. Scroll down to Windows Defender
4. Double click it to launch it.
5. Click on "tools"
6. click on "Options"
7. Scroll to the bottom
8. Uncheck "Use Windows Defender"
9. Click "Save"
Restart your computer, You should notice an immediate difference.
If you are still having the problem, then also turn off your windows
firewall.
--
JPW
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